I'm not sure of the best way, but I know a few ways that might be able to help you!
♦ Study your notes from class
♦ Try and practice different problems in the book
♦ Talk to your teacher about what you're having trouble with
♦ If you have power hours (study sessions) at your school, you should go to them
♦ You could get a math tudor; it could be your friend, or a paid tudor (or anyone else)
These are the only ones I could think of, I'm sorry if these don't help